Solomon b



.(No Model.)

' S. B. ELLITHORP.

CLAMP FOR LASTING MACHINES. No. 362,371. Patented May 3, 1887.

- 7 UNITED STATES PATENT (Prion.

SOLOMON B. ELLITHORP, OF BUFFALO, NEW YORK.

CLAMP FOR LASTING-MACHINEOS.

SPECIFICATION forming part of Letters Patent No. 362,371, dated May3,1887.

Application filed October 14, 1886.

To all whom it may concern:

Be 1t known that I, SoLoMoN B. ELLITHORP, a 011312611 of the UnitedStates, residing at Buffalo, 1n the county of Erie and State of NewYork, have invented a new and useful Improvement in Clamps forLasting-Machines, of which the following is a specification.

My lnvention relates to an improvementin clamps for Iastingmachines; andit consists in the peculiar construction and combination of devices thatwill be more fully set forth herelnafter, and particularly pointed outin the claims.

This invention is particularly designed for use in a lasting-machinesuch as described in the Letters Patent of the United States No.236,218, granted to me January 4, 1881, and No. 247,625, granted to meSeptember 27, 1881, and also described in my pending applications forLetters Patent of the United States, filed July 14, 1886, and bearingthe Serial Nos. 208,873 and 209,036; and the object of my presentimprovement is to provide a clamp which 1s adapted to firmly clasp theedge of the leather without in any way marring or injur- 1ng theleather. This object I accomplish by the construction hereinafterdescribed, and illustrated in the accompanying drawings, in

Figure 1 is a perspective view of a clamp embodylng my improvements,suspended from the templet of a lasting-machine. Fig. 2 is a verticalsection of the clamp; Fig. Sis a transin my Letters Patent and in myapplications for Letters Patent before mentioned.

0 represents a clamp, which comprises the rigid jaw D, the j aw-E, whichis pivoted thereto, and the cam-lever F, which is pivoted in the upperarm of the jawE, and is adapted to bear against the opposing side of theupper arm of the rigid jaw, so as to close the said rigid and pivotedjaws together and cause them to grasp Serial No. 216,256. (No model.)

the upper edge of the leather which forms the upper of the shoe. Thatside of the cam which bears against the upper arm of the rigid jaw whenthe leather is clamped is flattened, as at F, to prevent the clampleverfrom turning, and thus releasing the leather while the shoe is beinglasted.

Heretofore, in order to cause the clampingjaws to firmly engage the edgeof the leather, so that the latter will not slip while being lasted, thesaid clamping-jaws have been provided on their opposing sides withtransverse teeth or corrugations, which bite into the leather. Thisconstruction is disadvantageous, for the reason that the teeth orcorrugations mar the leather and cut into it, and thus weaken it at thepoint where it is engaged by the clamp to such an extent that after theupper is secured to the sole the upper, after the shoe has been worn fora short time, breaks away from the sole.

I provide the opposing faces of the clamping-jaws with circular cavitiesor recesses a. When the jaws are clamped onto the leather, it iscompressed between the faces of the clamping-jaws, and those portions ofthe leather which coincide with the cavities or recesses a are forcedinto the same, thereby enabling the clamping-jaws to obtain anexceedingly strong grip on the leather without marring or injuring it inthe slightest degree.

Between the opposing sides or faces of the clamping-jaws, and near theupper endsthereof, is secured an eXtensile coiled spring, G, the ends ofwhich are seated in countersunk openings or recesses E, that align witheach other and are made in the inner sides of the clamping-jaws. Thefunction of the said spring is to open the clamping-jaws as soon as thecam-lever is turned upwardly, and thus cause the clamping-jaws toinstantly release their grasp of the leather.

In the upper ends of the upper arm of the rigid jaw is made an elongatedopening, I, with which the hook B engages.

Heretofore some difficulty has been experienced in causing the clamps tograsp the edges of the leather when the upper has been out withoutallowing enough of the edge to project beyond the bottom of the last toenable the clamping-jaws to grasp it. This difficulty is overcome byproviding an elongated opening, I, in the upper end of the clamp. \Vhenthe teuiplet is lowered to its fullest extent, the clamp, which issuspended therefrom by the hook B, is enabled to be moved independentlyof the templet a distance corresponding to the length of the opening I,thereby enabling the clamp to be manipulated and worked over the edge ofthe leather, so as to obtain a grasp thereon.

I am aware that the jaws of garinent-elasps have been provided withcorrugated faces; but in this construction teeth or sharp biting-edgesare necessarily provided on the walls of the corrugations. The walls oropposing faces of the jaws are not made flat, as in my clamp, so thatwhen the cup shaped recesses are made in the flat faces there will be nosharp edges to mar, scratch, or otherwiseinjure the leather.

Having thus described my invention, I claiin 1. A clamp forlasting-machines, having its jaws made flat on their opposing faces,which flat opposing faces are formed with a series of cup-shapedrecesses or cavities, as set forth.

2. In aelamp for lasting-machines, the pivotedjaws having the flatopposing faces, which faces are provided with cavities a, a cam to closethe jaws, and the spring to open the same when the cam is released, asset forth.

3. In a clamp for lasting-machines, the combination of the pivoted jawshaving the recesses or cavities a on their opposing sides, and theextended arms, the cam pivoted to one arm and adapted to bear againstthe other to close the jaws, and the spring to open the jaws when thecam is released, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in 40 presence of two witnesses.

SOLOMON B. ELLITHORP.

Witnesses:

7M. N. MOORE, JOHN H. SIGGERS.

